NMF-350
Fast and Accurate Measurement Solution for Aspheric and Freeform Optics
Metrology plays a crucial role in realizing the potential of complex surfaces in the measurement of aspherical and freeform optics. Dutch United Instruments (DUI) has introduced the NMF™ series, built upon TNO’s proven NANOMEFOS technology.
High-End Metrology Performance in a Compact, Production-Ready Platform
The NMF-350 offers exceptional speed, accuracy, and non-contact measurement in a smaller system designed for floor-level deployment. It’s perfect for manufacturers looking to bring precision asphere and freeform metrology closer to the production line, without compromising on reliability or data integrity.
The accuracy of an interferometer with the versatility of a coordinate measuring machine.
This machine is specifically designed to provide easy and accurate metrology of complex optics to the workshop floor. This fast, non-contact tool is capable of measuring optics ranging from convex to concave and from flat to freeform, with a typical measurement uncertainty below 15 nm rms.
NMF Platform Approach
The NMF products combine five characteristics: versatility, accuracy, speed, non-contact and ease of use into one machine, making it one tool to cover all form metrology needs in modern high-end optical manufacturing.
Non-Contact Dual-Stage Probe
High NA confocal sensor combined with a special dual-stage design enables fast measurement of any rotationally symmetric parts such as spheres & aspheres as well as for non-rotationally symmetric freeform surfaces without sacrificing measurement speed.
The NMF Advantage
Closed-loop Metrology system with an extremely stable metrology frame.
Illustrative user interface requiring only brief (half day) operator training.
No need for frequent calibration, ensuring high availability: annual calibration is proven sufficient for many users
Cylindrical coordinate measurement machine setup with a non-contact dual-stage confocal sensor.
Key Enabling Technology
Cylindrical Coordinate Measurement Machine Setup
This ‘giant cd-player’ setup enables a couple of the key characteristics of NMF products, being universal and fast. The product to be measured is mounted on an air-bearing spindle, which is rotating continuously at for instance 1 rev/s. A non-contact confocal probe is mounted on a rotation axis (Ψ-axis) which positions it perpendicular to the surface to be measured or the best-fit rotational symmetric surface in case of freeform surfaces. The probe can be moved in radial (R) and vertical direction (Z) with the R and Z-stage, respectively.
Explore the Full Metrology Portfolio
Explore the complete portfolio of optical metrology systems designed to deliver fast, accurate, and non-contact measurement across a full range of surface shapes, sizes, and materials.